Sewing-machine.



H. HOUSTON.

SEWING MACHINE.

APPLICATION FILED D130. 10, 1907.

Patented May 4, 1909.

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|/l//77VESSE UNITED STATES PATENT OFFICE.

HUGH HOUSTON, OF LAWRENCE, MASSACHUSETTS.

SEWIfiG-MACHINE.

To all whom it may concern:

Be it known that I, HUGH HOUSTON, a citizen of the United States, residing at Lawrence, in the county of Essex and (emmonwealth of Massachusetts, have invented certain Improvements in Seuinghlachines,

- of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the sev. eral figures.

This invention relates to mill sewing machines for use in textile and other mills for .uniting the ends of" lengths of cloth for the purpose of adaptin' them to be operated upon as a single stip.

The objeet of the invention is to provide asimple and durable machine which is not likely'to get out of order, which will form a chain-stitch seam with great rapidity, and

in which the needle and looper can be adjust-ed quickly and easily to suit different conditions.

crank disk 4.

The several features of the invention, including certain details of construction and arrangement of parts, will be fully explained in the following description and then pointed out in the claims.

Figure -1 is a perspective view. Figs.

and 3 are detail views.

The base 1 has bearings for the shaft 2, which is provided with the pulley 3 and the The base also has a post 5 in which is journaled the looper shaft 6, carrying the looper 7 and the era ilk disk 3. The loo er is adjustable lengthwise on its shaft anc is held thereon by the screw 9. This shaft 6 is adjustable rotatively in the crank disk 8 and is .held by the screw 10, which is arranged as shown in Fig. 1 to be in con venient position for the operator to. manipu- The slidehas knife edges and is guided in the post in gibs 14, 15 which have grooves shaped to correspond with the edges of the slide. The gib 14 is fixed in the post, while Specification of Letters Patent.

Application filed December 10, 1907. Serial No. 405,962.

"cessed to receive the needle 30.

Patented May 4, 1909-.

the'gib 15 is adjustable edgewise of the slide by the screws 16, 16 to perfect its alinement and to take up wear between the slide and the gibs. The needle slide has a boss 20 on its front side which is bored to receive the stud 21, which is adjustable both endwise about a horizontal axis and is held in place by the binding screw 22. The head ot the stud has an opening to receive the combined needle bar aiulthread guide 24, which is adjustable rotatively about a vertical axis and also endwise and is held in position by the binding screw 25. The lower end portion of the bar is split as at 26 and i: re-

Thrsplit portion of the bar forms a clamp which is closed on the needle by a nut 32 which has screw-threaded engagement with it The needle is guided through the work plate 33, which has a headed slot at 2-H for this purpose. The post 5 also supports the ihread tension device which comprises glass friction disks 36 mounted on the stud 37 and held yieldingly toward each other by the spring 38 and nut 39.

A thread support projects from the post above the tension device and holds the thread in preferred relation to the tension. Spindle 40 supports the thread spool. The needle has a transverse eye 42 extending from the front to the back, viewing the ma-- chine from the end, or at a right angle to the plane of movement of the looper. The necdlc is also cut away on the rear side from a point at or a little above the eye to some distance above the eye, as at 44. rangement is such that as the needle carries the thread downwardly through the cloth an opening will exist between the cut-away side of the needle and the thread to permit.

.the point of the, looper to hook into the The point and the blade of thelooper are formed thin so as to facilitate the thread.

engagement with the thread in the cut-away portion. of the ncedlc. As will now be understood, a careful relative adjustment of the looper and needle is essential to obtain this accurate cooperation in the manner required for rapid operation of the machine. The looper has a recess at 45 to receive the point oi the needle at the time the looper is engaging the thread.

I prefer to use a convex guide late or work plate 56 for the cloth which is to be sewed, as, with such a feed, the cloth is carried down from the point of the needle, thus This arassisting the result described in the next paragraph which will dispense entirely with the use of a resser foot or feed bar or an intermittent feed of any kind. 7

The osts 54 and 55 are not joined at the top an the length of boss 20, stud 21, and the needle bar 24, together with the needle 30 is such that at the point of the needle,

there will be sufficient give to permita continuous feed of the cloth, as the point of the needle will travel with the cloth when it has passed therethrough and will spring back when it leaves the cloth so as to take. a new stitch. This action does not interfere with.

the drive throu h the crank disks, in 11,

'linkl2, and nee e slide 18, as link 12 is close 1. In a sewing machine head, the combination with a needle and a looper, of operating mechanism therefor comprising the slide 13, posts 54 and 55, joined at one end and separated at the other in which the slide is moved, a boss carried b the slide and needle bar carried by the boss or holding the needle as described? 2. In a sewing machine head, the coinbination of a looper and a needle, with actuatin mechanism therefor comprising the allned shafts'2 and 6, the crank disks 4 and 8,

operative connections between the crank eeaisi disks 4 and 8 and the needle, and a set screw v5 10, passed radially through disk'S tobear on 3 shaft 6, whereby the relative rotative position thereof may be adjusted.

3. In a sewing machine head, the combione end of said shaft, a disk carried by the other end of said shaft, a set screw which i passesradially through said disk and bears on the looper shaft, a power shaft alined with the looper shaft, a disk carried thereby, a pin between said disks, and a link carried the bottom but freeat t e top, adjustable gibs carried thereby, knife edge slots in said gibs, a knife edged slide fitted in said gibs and connected with said link, along boss cardle carried by said boss in operative relation with the looper.

fln a sewing machine head, the combina tion of a convex work plate, with a looper, a

radial set screw through said disk which bears on the looper shaft, a power shaft alined with the looper shaft, a disk carried thereby, apin between-said disks, and a link carried by said posts, adjustab boss carried by said slide, and a needle bar and needle, carried by said boss in operative relation with the looper as described. a

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' HUGH HOUSTON.

Witnesses:

FREDERICK L. Ennonns,

ARTHUR L. RUSSELL.

pin, with parallel open ended e gibs therein, a slide ber tween said gibs operated by said link, a long nation of a looper shaft, a looper carried Ly by said pin, with parallel osts connected at ried by said slide, and a needle bar and neelooper shaft, a disk carried on said shaft, a 

